<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>跳出框架</title>
</head>
<body>
  <p>被锁在框架中了吗？</p>

  <a href="https://www.w3school.com.cn/index.html" target="_top">请点击这里！</a>
</body>
</html>